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Home >> BMW >> 2021 >> 750i xDrive >> Repair and Diagnosis >> Accessories & Equipment >> Steering Column Switches >> General Electrical System -- Repair (G12) (1 Of 2) >> 61 21 Battery (12V And 48V) >> 61 21 004 Replacing the 12V dual storage system - registering with battery change - (all 7' series models 2016-2022) >> Removing the 12V dual storage system

Removing the 12V dual storage system

Preliminary work 

WARNING: Working on 12 V electrical system. 
Risk of short circuits! Risk of fire! 
  • Make sure that there is no charger  connected to the jump start terminal in the engine compartment.
  • Detach battery ground lead from battery.
  • For auxiliary batteries: Detach battery minus cables from all auxiliary batteries.
WARNING: Unprotected battery terminals. 
Risk of short circuits! Risk of fire! 
  • Cover the vehicle battery.
G14198385Courtesy of BMW OF NORTH AMERICA, INC.